Network Security Engineer

Syntax Consultancy Ltd; United Kingdom; On-site; GBP 60,000 - 81,000; Full time

Job summary

Syntax Consultancy Ltd. is seeking a Network Security Engineer with active SC clearance for a 6-month contract. The role is UK remote with hybrid options and may require occasional travel to sites across Warwick, Wokingham, Corsham and Farnborough.

Start ASAP in August/September 2026. You will own security infrastructure design and lifecycle, act as technical reference for firewall changes, support vendor incidents, and design networks with HLD/LLD guidance while delivering change control and

Qualifications

• Strong hands-on experience with F5, Zscaler, and Palo Alto technologies.
• Experience with Check Point, Juniper, Blue Coat, and Cisco Network Solutions.

Responsibilities

• Own the security infrastructure estate, processes, documentation and lifecycle management.
• Act as technical reference and escalation for security changes, modifications and firewall rule projects.
• Serve as vendor contact for security incidents.
• Design customer networks including High Level Design (HLD) and Low Level Design (LLD).
• Provide technical support and change management for physical and remote changes, inventory management.

Skills

Technical ownership

Vendor liaison

Tools

F5 BIG-IP

Zscaler

Palo Alto Networks

Check Point

Juniper Networks

Blue Coat

Cisco Network Solutions

Job description

Network Security Engineer (SC Cleared)

UK Remote/Hybrid

6 Month Contract

£380/day (Outside IR35)

Network Security Engineer needed with active SC Security Clearance for a 6 Month Contract. Start ASAP in August/September 2026.

The vast majority of the work is expected to be remote. However, there may be occasional travel to UK customer sites including - Warwick, Wokingham, Corsham + Farnborough.

Working with a global IT Consultancy supporting a leading Telecoms end client:

• Must have strong hands-on experience of: F5, Zscaler + Palo Alto technologies. Checkpoint, Juniper, Bluecoat, Cisco Network Solutions
• Technical Ownership of Customer Security infrastructure estate, processes, procedures, documentation + life cycle management.
• Acting as technical point of reference + escalation for Security related changes, modifications + projects for firewall rule bases.
• Technical point of contact for vendor support for security infrastructure incidents.
• Design of customer networks including the support of High Level design (HLD) and Low Level design (LLD).
• Providing technical support, Change management, for hard physical changes + soft remote changes, customer inventory management, hardware software, EOL.
• Advantageous Skills: Checkpoint, Juniper, Bluecoat, Cisco Network Solutions, Cisco IPT / QoS / 802.1x / Inflobox DNS, Switches, Wireless, VPN (ipsec, SSL VPN, DMVPN, WAN Routing Protocols.
• Telecoms industry sector experience preferred.
• Must have active SC Security Clearance.